Trajectory stability increased golf clubs with pluralities of holes

ABSTRACT

A golf club head is provided, which has a number of holes developed on the head by installing a number of metal tubes of 3 mm diameter between the front face and rear face of the head. Another embodiment of the current application is a golf iron having a number of holes on the head. Air stream through the holes stabilizes the trajectory of the golf clubs at high speed of swing.

BACKGROUND OF THE INVENTION

Driving is known as the most important and frustrating part of golfgame. If a golf ball is not hit at right angle and with the properstrength, the ball flies to a wrong direction and falls in a rough.However, most of golf drivers are designed to maximize a flying distanceof a golf ball and focused on maximizing repulsion force. None of themconcerns about a stability of the trajectory of a driver when a playerdoes swing. When a player swings a driver for T-off, the speed of adriver club head reaches well over 40˜50 meter/second. This speed isover 150 km/hr. At this speed, the resistance of air to the club head issignificant. Even a slight unbalance of the drag force shakes thetrajectory of the club head and moves the hitting point of the golf clubfrom the center of the club head. It is the purpose of the currentapplication to provide a golf club head, including a driver's head,which increases the stability of the trajectory of the club head toincrease the accuracy of the impact, especially at T-off moment.

FIELD OF THE INVENTION

This invention relates to a golf club head designed especially forimproving the accuracy of a T-off moment for an amateur golfer.

DESCRIPTION OF PRIOR ART

U.S. Pat. No. 5,464,211 to Atkins, Sr. illustrates a hollow golf clubhead for a “metal wood” wherein an internally mounted backing plategives strength and stability to the striking face of the club.Additionally, in the preferred embodiments, an internal apparatus ispresent whereby the backing plate is compressively loaded to morerigidly support the striking face of the club, thereby to make it moreunyielding upon impact with a golf ball. There is no hole developedthroughout the head from the face to the rear part.

U.S. Pat. No. 4,944,515 to Shearer illustrates a cast metal hollowheaded golf club head having there within at least one internalstructural support member disposed between the rear of the club head andthe face of the club head, a first end of the internal structuralsupport member being positioned at the geometric center of the face ofthe club head and a second end of the structural support member openingthrough the rear surface of the hollow headed golf club and having anopen bottom thereto which a bottom plate is permanently secured afterthe internal cavity of the hollow headed golf club is filled with asound-proofing material, the internal structural member adapted to houseadditional metal or similar material to predetermine the resultingweight of the golf club head. However, there is no supporting structurehaving a hole developed throughout the club head.

U.S. Pat. No. 4,535,990 to Yamada illustrates a golf club head that ishollowed out to provide desired lightweight characteristics. A tubularreinforcement material formed of plastic including reinforcement fibers,separate from the club head itself, is inserted into the cavity attachedat the inner walls of the face and back, so as to span between them toprevent deformation of the head face and to hold the stiffness andmechanical strength required at its impact face. But, both of the endsof the tubular reinforcement are blocked.

U.S. Pat. No. 4,461,481 to Kim illustrates a driver type of golf club,which includes a hollow metal head having integrally formed thereon afront striking face and a rear wall with interior flat portions, and aremovable sole plate. A rod having a back plate integrally formed on therear thereof has a cylindrical weight slidably mounted thereon.

U.S. Pat. No. 4,067,572 to Coleman illustrates a golf club having ashaft and a club head, the club head comprising a stationary, main bodyportion, and a face portion which is movable with respect to thestationary portion to vary the angular disposition of the face portionwith respect to the stationary portion and the shaft of the club.

None of the prior art teaches a club head having pluralities of holesdeveloped from the face thereof to the rear end of the club, includingdriver, to allow air pass through the club head to stabilize thetrajectory of the club head.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a golf club headhaving increased stability of its swing trajectory. The golf club driverhead of the current application, with increased trajectory stability,has a number of holes developed on the head by installing a number ofmetal tubes of 3 mm diameter between the front face and rear face of thehead. The holes developed on the club head allow air pass through andthe air stream stabilizes the trajectory of the club head's swing. Thisstabilized swing trajectory increases the possibility of a golf ball hitat the right point and stay on the green of the golf course. Other golfclubs, irons, also have pluralities of holes on the head developed bypunching holes with drills. When a player swings a driver for T-off, thespeed of a driver club head reaches well over 40˜50 meter/second. Thisspeed is over 150 kmn/hr. At this speed, the resistance of air to theclub head is significant. Even a slight unbalance of the drag forceshakes the trajectory of the club head and moves the hitting point ofthe golf club from the center of the club head. Irons are usually usedon the fair way of a golf course for medium range hitting. High-speedswing is not necessary in such situation. However, some player T-offwith an iron. In that case, the player needs an iron with stable swingtrajectory. It is the purpose of the current application to provide agolf club head, including a driver's head, which increases the stabilityof the trajectory of the club head to increase the accuracy of theimpact, especially at T-off moment.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic exploded drawing of a golf club driver's head inprior arts.

FIG. 2 is a schematic perspective view of the airflow surrounding theclub head of the prior art.

FIG. 3 is an exploded view of the club head of the current application.

FIG. 4 is a front face view of the club head of the current application.

FIG. 5 is a rear view of the club head of the current application.

FIG. 6 is a cross sectional drawing of the club head along the line A-A′in FIG. 5 showing the arrangement of the metal tubes in the club head ofthe current application

FIG. 7 is a cross sectional drawing of the club head along the line A-A′in FIG. 5 showing the securing mechanism of the metal plates into thefront and rear faces of the club head of the current application whenthe materials for the faces and metal plates are different.

FIG. 8 is a rear view of the club head of the current applicationshowing the locking key when the materials for the faces and metalplates are different.

FIG. 9 is a schematic perspective view of the airflow surrounding theclub head of the current application.

FIG. 10 is a perspective view of an iron head having pluralities ofholes thereon.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

FIG. 1 is an exploded view of a golf driver club head 5 of the priorart. The golf club head 5 is shown comprised of a casing 10, an axletube 20, a packing plate 30, and a cover plate 40. The casing 10 is madeof a compound material subject to a predetermined shape. The casing 10has a front face 11, a bottom face 12, a back face 13, a toe 14, a heel15, and a neck 16. The inside of the casing 10 is hollow. The topside ofthe casing 10 is opened. The axle tube 20 is a stepped metal tube fittedinto the neck 16 of the casing 10 for receiving a club shaft (notshown). The packing plate 30 is a substantially L-shaped thin sheet ofmetals fixedly fastened to the front face 11 and bottom face 12 of thecasing 10, forming the face panel 31 and sole 32 of the golf club head5. The face panel 31 has a plurality of hitting grooves 311 thereon. Theprimary role of these hitting grooves is to increase a contact area. Thesecond role of these hitting grooves is to distribute air to both sidesof the face panel 31 to maintain a balance of air resistance to the clubhead 5.

FIG. 2 is a schematic perspective view of the airflow surrounding theclub head 5 of the prior art. When the club head 5 proceeds along thetrajectory 6, the air 7, in front of the club head, meets the club head5 on the face panel 31. At this moment, the air 7 flows around the headin every direction. The hitting grooves 311; formed on the front facepanel 31, guide the air to flow side way horizontally. Thesehorizontally flowing side streams of the air 8-L and 8-R prevent theclub head 5 from oscillating up and down. However, when the balancebetween the horizontally flowing side streams 8-L and 8-R is lost, theclub head 5 will oscillate horizontally.

It is the purpose of the current application to provide a club head thatis stable when a player doing T-off, i.e., high speed hitting.

FIG. 3 is an exploded view of the driver club head (55) of the currentapplication. The driver club head (55) of the current application has anumber of holes (56) developed on the center of the front face (51). Amodule (57-1), which is comprised of a number of metal tubes (57) of 3mm diameter and two circular metal plates of (58-F) and (58-R), to whichthe number of metal tubes (57) are welded and have the same number ofholes of 3 mm to receive the metal tubes (57), is inserted to the insideof the club head (55) through the holes of (51-1) and (59-1), which aredeveloped at the center of the front face (51) and the rear face (59),respectively. The two circular metal plates (58-F) and (58-R) are weldedagain to the front face (51) and the rear face (59), respectively. Oneend of each metal tube (57) is open to the front face (51) to form thehole (56). The other end of each metal tube (57) is open to the rearface (59). Therefore, the holes (56) are open from the front face (51)to the rear face (59). FIG. 4 and FIG. 5 are a front face view and arear view of the club head of the current application, respectively. Theholes (56) allow air pass through the driver club head (51) when aplayer swings.

FIG. 6 is a cross sectional drawing of the club head (55) along the lineA-A′ in FIG. 4 showing the arrangement of the metal tubes (57) in theclub head of the current application. The metal tubes (57) are placedbetween the metal plates (58-F) and (58-R). Each end of the tubes (57)are inserted to the holes (56) and (56′), developed on the metal plates(58-F) and (58-R) respectively, that they are facing. After that themetal plates (58-F) and (58-R) and the tubes (57) are welded along theperimeter of the hole (56) and (56′). The welding points are indicatedas (60) and (61). The metal plates (58-F) and (58-R) are again welded tothe front face (51) and rear face (59) respectively along the perimeterof the plates as indicated as (62) and (63).

Material for the front face (51), rear face (59), circular plates(58-F), (58-R) and metal tubes (57) may be the same. The preferredmaterial is Titanium.

FIG. 7 is a cross sectional drawing of the club head (55) along the lineA-A′ in is FIG. 4 showing the securing mechanism of the metal platesinto the front (51) and rear faces (59) of the club head of the currentapplication when the materials for the faces and metal plates (58-F) and(58-R) are different. If the material of the front and rear face, (51)and (59), are different from that of the metal plates, (58-F) and(58-R), the metal plates are engaged to the front and rear face viascrews indicated as (62′) and (63′). FIG. 8 is a rear view of the clubhead of the current application showing the locking key (64) when thematerials for the faces and metal plates are different. A locking key(64) is installed on the rear face (59) and rear metal plate (58-R).

FIG. 9 is a schematic perspective view of the airflow surrounding theclub head (55) of the current application. As the club head (55) movesat high speed along the trajectory (66), the air meets club head. Theair meet the center part of the club head (55) pass through the holes(57) and the air meet the side part of the club head pass along thegrooves (511) and develop air streams (65-L) and (65-R). In addition tothe balance of the air streams (65-L) and (65-R), another air stream(67) that pass through the tubes (57) develops a steady force thatprevents the club head from shaking and holds the club head (55) remainson the trajectory (66). As a result, the stability of the trajectory ofthe club head remarkably increased.

FIG. 10 is a perspective view of an iron head (68) having pluralities ofholes (69) thereon. The holes (69) on the iron are formed by drilling.The principles of stabilizing the trajectory of the club head athigh-speed swing are the same as those introduces for the driver headcase.

1. A golf club head, which has a number of holes, developed from thefront face to the rear face, at the central part of the head byinserting a module, which is comprised of a number of metal tubes of 3mm diameter and two circular metal plates which have same number ofholes of 3 mm diameter to receive the tubes and welded to the metaltubes, inside of the head through the holes developed on the front andrear face and adhere the module to the front and rear faces for allowingair pass through the holes freely at T-off.
 2. A golf club head of claim1, wherein the golf club is a driver.
 3. A golf club head of claim 1,wherein the number of metal tubes is
 9. 4. A golf club head of claim 1,wherein the metal is titanium.
 5. A golf club head, having a number ofholes at the central part of on the head.
 6. A golf club head of claim5, wherein the golf club is iron.
 7. A golf club head of claim 5,wherein the golf club is putter.